Catalyst for electrocatalytic carbon dioxide reduction reaction as well as preparation method and application of catalyst

Abstract

The invention belongs to the technical field of catalyst preparation, and provides a catalyst for electrocatalytic carbon dioxide reduction reaction as well as a preparation method and application thereof. According to the catalyst disclosed by the invention, a boron element is doped on a three-dimensional porous carbon skeleton, and the boron element, a nitrogen atom and a nickel metal single atom form a Ni-N4B2 active site, that is, the doping of the boron element changes a coordination environment of the center of the active site; therefore, the catalyst improves the Faraday efficiency of the product of the Ni-N4 site under high current density in the electrocatalysis carbon dioxide reduction process. Data of the embodiment show that when the catalyst obtained in the embodiment 1 is loaded on a gas diffusion electrode, the current density of the catalyst reaches 213 + / -30mA. Cm <-2 > under the potential of-1.2 V, and the Faraday efficiency of the product carbon monoxide under the potential reaches up to 97.37%.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a catalyst for electrocatalytic carbon dioxide reduction reaction and its preparation method and application. Background technique [0002] The reduction of carbon dioxide to chemical feedstocks via electrocatalysis offers a promising strategy for promoting global carbon balance. However, due to the low kinetics of the electrocatalytic CO2 reduction reaction and the accompanying severe side reactions, catalysts for the CO2 reduction reaction with both high catalytic activity and high selectivity are still the goal of current exploration. [0003] Traditional electrocatalytic carbon dioxide reduction catalysts include Cu, Au, Ag and their alloys, which have relatively large defects in catalytic performance. Although the recently emerging single-atom catalysts have relative advantages, they still have shortcomings in terms of catalytic performance, mainly reflected in...

AI Technical Summary

Problems solved by technology

However, due to the low kinetics of the electrocatalytic carbon dioxide reduction reaction and the accompanying severe side reactions, catalysts for the carbon dioxide reduction reaction with both high catalytic activity and high selectivity are still the goal of current exploration.

[0003] Traditional electrocatalytic carbon dioxide reduction catalysts include Cu, Au, Ag and their alloys, which have relatively large defects in catalytic performance.

Although the recently emerging single-atom catalysts have relative advantages, they still have shortcomings in terms of catalytic performance, mainly reflected in the low selectivity of products at high current densities.

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